Disulfur monoxide

Disulfur monoxide
Names
	Other names sulfur suboxide; sulfuroxide;
Identifiers
CAS Number	20901-21-7 ;
3D model (JSmol)	Interactive image;
ChemSpider	124163;
PubChem CID	140772;
CompTox Dashboard (EPA)	DTXSID90175054 ;
	InChI : InChI=1S/OS2/c1-3-2 Key: TXKMVPPZCYKFAC-UHFFFAOYSA-N;
	SMILES O=S=S;
Properties
Chemical formula	S2O
Molar mass	80.1294 g/mol
Appearance	colourless gas or dark red solid
Structure
Coordination geometry	bent
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	toxic
Related compounds
Related compounds	Trisulfur; SO; Ozone; SO2
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Disulfur monoxide or sulfur suboxide is an inorganic compound with the formula S₂O, one of the lower sulfur oxides. It is a colourless gas and condenses to give a roughly dark red coloured solid that is unstable at room temperature.

S
₂O occurs rarely in natural atmospheres, but can be made by a variety of laboratory procedures. For this reason, its spectroscopic signature is very well understood.